diff --git a/graphics/glvis/files/patch-lib_aux__vis.cpp b/graphics/glvis/files/patch-lib_aux__vis.cpp
new file mode 100644
index 000000000000..a049d97c2e3c
--- /dev/null
+++ b/graphics/glvis/files/patch-lib_aux__vis.cpp
@@ -0,0 +1,13 @@
+--- lib/aux_vis.cpp.orig	2022-09-11 23:06:14 UTC
++++ lib/aux_vis.cpp
+@@ -822,8 +822,8 @@ const char *glvis_screenshot_ext = ".bmp";
+ #if SDL_BYTEORDER == SDL_BIG_ENDIAN
+ Uint32 rmask = 0xff000000;
+ Uint32 gmask = 0x00ff0000;
+-Uint32 bmask = 0x0000ff00:
+-               Uint32 amask = 0x000000ff;
++Uint32 bmask = 0x0000ff00;
++Uint32 amask = 0x000000ff;
+ #else // little endian, like x86
+ Uint32 rmask = 0x000000ff;
+ Uint32 gmask = 0x0000ff00;